Metrohm 787KF User Manual

CH-9101 Herisau/Switzerland

E-Mail [e-mail]

Internet www.metrohm.com

787 KF Titrino

Program version 5.787.0010

Instructions for Use

8.787.1003

03.2002 / pkl

			Table of contens
Table of contents
1	Introduction ..........................................................................................................		1
	1.1	Instrument description...........................................................................................	1
	1.2	Controls and parts.................................................................................................	2
2	Manual operation..................................................................................................		6
	2.1	Keypad ..................................................................................................................	6
	2.2	Principle of data input............................................................................................	7
	2.3	Tutorial ...................................................................................................................	8

	2.3.1		Entering data, setting the dialog language....................................................	8
	2.3.2		Titer determination .......................................................................................	10
	2.3.3		Karl Fischer titration .....................................................................................	15
	2.3.4		Drift...............................................................................................................	16
	2.4	Selection of the mode, key <MODE> ................................................................		18
	2.5	Configuration, key <CONFIG>...........................................................................		19
	2.6	Parameters, key <PARAM> ...............................................................................		22
	2.6.1		Parameters for SET ......................................................................................	22
	2.8	Result calculations...............................................................................................		31
	2.9	Drift display, key <DRIFT> .................................................................................		36
	2.10		Data output ......................................................................................................	37
3	Error messages, Troubleshooting.....................................................................			39
	3.1	Error and special messages................................................................................		39
	3.2	What can you do if the data transfer does not work?..........................................		41
	3.3	Diagnosis.............................................................................................................		42
	3.3.1		General.........................................................................................................	42
	3.3.2		Procedure.....................................................................................................	42
	3.3.3		Equipment required: ....................................................................................	43
	3.3.4		Diagnosis steps ...........................................................................................	43
	3.4	Initialise and test RAM .........................................................................................		52
	3.5	Releasing a locked spindle with inserted Exchange Unit....................................		53
4	Preparations .......................................................................................................			53
	4.1	Setting up and connecting the instruments ........................................................		53
	4.1.1		Titrino with Titration Stand or Stirrer .............................................................	53
	4.1.2		Connection of a printer ................................................................................	54
	4.1.3		Connection of a balance..............................................................................	55
	4.1.4		Connection of a KF Oven.............................................................................	57
	4.1.5		Connection of the 774 Oven Sample Processor..........................................	57
	4.1.6		Connection of a Sample Changer ...............................................................	58
	4.1.7		Connection of a recorder .............................................................................	59
	4.1.8		Connection of a computer ...........................................................................	60
	4.2	Connection of electrodes, preparing titration vessel...........................................		61
5	Appendix.............................................................................................................			63
	5.1	Technical specifications ......................................................................................		63
	5.2	Pin assignment of the "Remote" socket...............................................................		65
	5.2.1		Lines of the "Remote" socket during the titration .........................................	67
	5.3	RS232 interface ...................................................................................................		68

787 KF Titrino

Table of contents

5.4	Validation / GLP...................................................................................................		69
5.5	Warranty and conformity .....................................................................................		70
5.5.1		Warranty.......................................................................................................	70
5.5.2		EU Declaration of conformity.......................................................................	71
5.5.3		Certificate of Conformity and System Validation .........................................	72
5.6	Scope of delivery and ordering designations .....................................................		73
Index	...........................................................................................................................		77

787 KF Titrino

1.1 Instrument description

1 Introduction

1.1 Instrument description

The 787 KF Titrino is a fast and precise titrator for the water determination according to Karl Fischer.

With the Metrodata VESUV Software determination data can be saved on a PC.

787 KF Titrino	1

1.2 Controls and parts

1.2 Controls and parts

Front view of instrument:

2

787 KF Titrino

1.2 Controls and parts

1Exchange Unit

2Display

3Setting of display contrast

4Controls the dosing rate during manual dosing with <DOS> and subsequent filling

5Control keys and indicator lamps on the Titrino

Key <DOS>	Dosing key. Dispensing is performed as long as <DOS> is being
	pressed. Used e.g. to prepare the Exchange Unit. The dispensing
	rate can be set with potentiometer (4).
Key <STOP/FILL>	- Stops procedures, e.g. titrations, conditioning.
	- Filling after manual dosing with <DOS>.
Key <START>	Starts procedures, e.g. titrations, conditioning.
	Identical with key <START> of the separate keypad.
Indicator lamp:
"Cond."	Lamp flashes during conditioning. Lamp is on when the titration
	cell is conditioned.

787 KF Titrino	3

1.2 Controls and parts

Rear view of instrument:

4

787 KF Titrino

1.2 Controls and parts

6RS232 interface

for the connection of printer, balance or a computer

7Remote lines

(input/output)

for the connection of Sample Changers, robots etc.

8Connection for the KF electrode

9Connection for separate keypad

10Analog output for the connection of a recorder

11Connection for power cable

With power supplies where the voltage is subject to severe HF disturbances, the Titrino should be operated via an additional power filter, e.g. Metrohm 615 model.

12Mains switch

13Earthing socket

14Connection for Ti Stand or stirrer

703 Ti Stand or 728 Magnetic Stirrer Supply voltage: 9 VDC (I ≤ 200 mA)

15Display of the set mains voltage

Before switching on for the first time, check that the set mains voltage matches the voltage of your power supply. If this is not the case, disconnect mains cable and change voltage.

16Rating plate

with fabrication, series and instrument number

787 KF Titrino	5

2.1. Keypad

2 Manual operation

2.1 Keypad

CONFIG	Configuration, see page 19.
PARAM	Parameters, see page 22.

CALC DATA Result calculation, see page 31.

These keys are opening the corresponding menus.

For the principle of data input see page 7.

DRIFT	ON/OFF switching of the drift display,
	see page 36.
UNIT	Unit of result and sample size, see
	page 34.
SELECT	Selection of special values (dialog
	marked with ":")
MODE	Mode selection, see page 18.
PRINT	Printing of reports, see page 37.
CLEAR	Clears values, set special values.
ENTER	Stores values.
STOP	Stops methods.
QUIT	Quits inquiries, waiting times, printing.
START	Starts methods.

6	787 KF Titrino

2.2 Principle of data input

2.2 Principle of data input

KFT	********

KFT	********
>KF	device settings

KFT	********
>peripheral units
KFT	********
send to:	IBM

KFT	********
>auxiliaries

KFT	********

•The first line of the display always shows the active mode (in this case "KFT") and the state of the Titrino. "********" means the Titrinos is in its standby state.

•The keys <CONFIG>, <PARAM> and <CALC DATA> are opening the corresponding menus.

•Pressing one of this keys shows the first group of inquiries of the corresponding menu in the second line of the display.

Example key <CONFIG>:

You opened the configuration menu, the second line of the display shows the first group of inquiries of this menu ">KF device settings".

•By pressing <CONFIG> repeatedly you can move to the other titles of this menu. With pressing <CONFIG> 2 times you go to the group of inquiries "peripheral units".

•If a dialog text is marked with ">", it contains a group of inquiries. You branch into this group by pressing <ENTER>.

•Example first inquiry of the group "peripheral units": Now you opened the first inquiry of the group peripheral units in the configuration menu and you can change the setting.

If a dialog text of an inquiry is marked with ":", you can select a value with the key <SELECT>.

•A value is stored with <ENTER> and the cursor moves to the next inquiry.

•Repeated pressing of <ENTER> moves you through the inquiries of the group ">peripheral units“, after the last inquiry of this group you leave this group and return to the level above.

The next group of the menu "configuration“ appears: ">auxiliaries“

•With key <QUIT> you leave an inquiry or a group of inquiries, it always moves you one level up.

•In this example you leave the menu "configuration" by pressing <QUIT> and return to the standby state with the display of the titration mode.

787 KF Titrino	7

2.3. Tutorial

2.3 Tutorial

This short operating course teaches you to work quick and efficient with the 787 KF Titrino, by means of the most important applications.

Set up your Titrino and connect the peripheral devices needed, see chapter 4.

2.3.1 Entering data, setting the dialog language

We can thus make a start and first take a look at the fundamentals of the entry of data. We change the dialog language.

KFT ********

	<CONFIG>
KFT	********

>KF device settings

3 × <CONFIG>

•Switch on the Titrino. It is now in the standby state, it shows you the active mode.

•Press the key <CONFIG>, the display shows:

This is the title of the group "KF device settings". This group contains various inquiries for the KF titraton.

•Press <CONFIG> 3 times. You see the titles of the other groups of inquiries in the configuration menu. The display shows

KFT	********
>auxilliaries

<ENTER>

This "auxiliaries" group contains the inquiry for the dialog language.

•Pressing the <ENTER> key takes you to the inquiries of the group "auxiliaries". Note the ">" sign. All titles of inquiry groups are prefixed by this sign.

KFT	********
dialog:	english

	<SELECT>
KFT	********
dialog:	español
	<ENTER>
KFT	********
fecha	2002-03-27

This is the first inquiry of the "auxiliaries" group: the selection of the dialog language.

•You select the various dialog languages with the <SELECT> key. Press <SELECT> repeatedly until "español" appears in the display.

Note the sign ":". It appears if the values can be selected with the key <SELECT>.

•Accept the new "value" with <ENTER>.

The next inquiry "fecha" (date) of the group "ajustes varios" (auxiliaries) is shown.

You can open this inquiry by pressing <ENTER> too and go through all the inquiries of this group this

8	787 KF Titrino

			2.3 Tutorial
			way.
			Because this inquiry follows no colon ":" the value
			can't be selected by <SELECT>, the date "fecha"
			has to be entered with the numeric keys.
<QUIT>			• Exit the inquiries with <QUIT>. You are one level
			higher in the "configuration" menu showing the title
KFT	********
			"ajustes varios" (auxiliaries).
>ajustes varios
<QUIT>			• Press <QUIT> once again to exit the "configuration"
			menu and return to the standby state.
			All the dialog texts will now be displayed in Spanish.
KFT	********
			If you prefer English as the displayed dialog lan-
			guage, proceed as before and select "English".

787 KF Titrino	9

2.3. Tutorial

2.3.2 Titer determination

Set up your titration vessel, see page 61f and plug your KF electrode into the measuring input ('KF electr.').

Put a Exchange Unit with KF reagent on the Titrino and rinse the tubing and the buret tip with <DOS>. Fill the buret again with <STOP/FILL>.

Fill your titration vessel with solvent, put a stirrer bar in the titration vessel and switch on the stirrer.

For the titer determination you need water and a syringe that allows the exact dispensing of 30 µL.

Selection of the mode

	<MODE>
KFT	********

TITER with H2O or Std.

•Press <MODE> repeatedly until "TITER with H2O or std." appears in the display.

	<ENTER>	• Confirm "TITER with H2O or std." with <ENTER>.
TITER	********	The mode "TITER" is active and instrument is in its
		standby state

Briefly check a few settings under the <PARAM> key:

2 × <PARAM>

TITER ********

>preselections

<ENTER>

•Press <PARAM> twice so that the title "preselections" appears in the display:

View the individual inquiries of this group with <ENTER>. The following values should be set:

			Automatic drying of the titration cell before and be-
	TITER	********
			tween titrations: "ON".
	conditioning:	ON
	<ENTER>
			Request of the sample identification after the titration
	TITER	********
			start: "OFF".
	req.ident:	OFF
	<ENTER>
			Request of the sample size after the titration start:
	TITER	********
			"ON".
	req.smpl size:	ON
	<ENTER>
			If no printer is attached, the report printout after the
	TITER	********
	report:	OFF	titration must be switched off.

10	787 KF Titrino

2.3 Tutorial

or

			With a connected printer, the short report, for example,
	TITER	********
			can be selected.
	report:	short

<ENTER>

If you have to alter one of these settings, you can do this with the <SELECT> key.

Your titration vessel already contains solvent. Start with <START>. First the titrations cell is dried. The display shows

TITER	wait

as long as the vessel is still wet and the green "Cond." lamp flashes. As soon as the titration vessel is dry and hence ready for operation, this is shown by

TITER conditioning

an the "Cond."-LED lights continuously.

To determine the titer we shall perform several titrations and store the mean value as "titer".

Calculating the mean value and standard deviation

Check that the mean value calculation is switched on:

2 × <CALC DATA>

• Press <CALC DATA> twice until the display shows

TITER	********
>statistics
	<ENTER>
TITER	********
mean:	n= 20

2 × <QUIT>

the title of the group is "statistics". Press <ENTER>.

Number of single determinations for the calculation of the mean value. Since the mean value is recalculated after every determination, the maximum value can remain set at 20. The mean calculation is terminated when the operating mode is changed.

• Exit the inquiry.

787 KF Titrino	11

2.3. Tutorial

Determination
<START>			• Now prepare the sample, e.g. 30 µL water and start
			the titration with <START>. The display shows
KFR volume	0.000 ml
smpl size		1.0 g

0.03

<ENTER>

KFR volume ↑	1.426 ml
#======

• Inject the sample and enter the weight in g:

If you have connected a balance, you can also backweigh the syringe.

The titration now runs.

The first line of the display shows the current volume. In addition, a "↑" appears when dispensing is being performed.

A "control bar" appears on the second line and shows the control deviation of the current measured value from the set endpoint.

			On completion of the titration, the first line shows the
	KFR volume	5.632 ml
			dispensed volume and the second the calculated titer.
	titer	5.3267 mg/ml
			If you have connected a printer, a report is also printed:
				date 2002-03-27		time 13:55:10	3
				smpl size	0.03	g
				titer	5.3267	mg/ml
					============

Perform another determination.

On completion of the titration, the mean value of the two determinations is calculated. The report on the printer has the following appearance:

date 2002-03-27		time 13:55:10	3
smpl size	0.03	g
titer	5.3686	mg/ml
mean (2)	5.3477	mg/ml
+/-s	0.02973	mg/ml
s(rel)	0.56	%

============

12	787 KF Titrino

2.3 Tutorial

Viewing the statistics data

If you have not connected a printer, you can view the statistics data on the display with <SELECT>.

				•	From the result display "titer", switch to the display of
KFR volume	5.676	ml
titer	5.3686 mg/ml				the mean value with <SELECT>.
<SELECT>
				Mean value of 2 determinations.
KFR volume	5.676	ml
				•	Press <SELECT> again and the standard deviation
mean (2)	5.3477 mg/ml
					is shown.
<SELECT>
				Absolute standard deviation.
KFR volume	5.676	ml
				•	Pressing <SELECT> once more leads to the
+/-s	0.02973 mg/ml
<SELECT>
				relative standard deviation.
KFR volume	5.676	ml
s(rel)	0.56 %			•	<SELECT> returns you to the result display.

<SELECT>

Repeat the titer determination once more.

With a connected printer you may want a printout of the single results that are used for the statistics calculation: press the key sequence <PRINT><1><ENTER>.

Let us assume that you have discovered that one of the values is an "outlier" and you would like to delete it.

Deleting a result in the mean value calculation

2 × <CALC DATA>

KFR volume	5.676	ml
>statistics
2× <ENTER>
KFR volume	5.676	ml
res.tab:	original

In our example, the deviation of the second result is excessive. We thus wish to delete it:

•Press <CALC DATA> twice. The display shows:

•Open with <ENTER> the inquiry of the result table "res.tab:"

<SELECT>

KFR volume	5.676 ml
res.tab:	delete n

<ENTER>

•Press <SELECT> to display "delete n". This means that you wish to delete a single result with the index n in the result table.

787 KF Titrino	13

2.3. Tutorial

			• Enter the index of the result you wish to delete, in
KFR volume	5.676 ml
delete	n=	1	our case the second:

<2>

<ENTER> 2 × <QUIT>

• Exit the inquiry with <QUIT>.

Mean value and standard deviation are recalculated and can be viewed in the display.

If you have connected a printer, a new report is printed out.

Following this titer determination, you now decide to perform Karl Fischer determinations. The titer just determined will be automatically used here.

14	787 KF Titrino

		2.3 Tutorial
2.3.3 Karl Fischer titration
<MODE>		• Select the "KFT" mode: Press <MODE> repeatedly
KFR volume	5.676 ml	until the display shows
KFT
<ENTER>		• Accept this mode with <ENTER>

KFT conditioning

<CALC DATA> 3 × <ENTER>

KFT	conditioning
titer	5.3326 mg/ml

The instrument is in the KFT mode and the titration cell is ready for operation.

•Check briefly that the titer just determined has also been adopted: Press <CALC DATA>, branch to the group "calculation" with <ENTER> and then press <ENTER> two times more to display the following inquiry.

2 × <QUIT>

• Exit the inquiry by pressing <QUIT> twice.

Now prepare your sample and titrate it.

Result calculation and unit of the result

The result is calculated by the following formula:

water(content) = (volume(KFR) −blank)×titer ×factor smplsize ×divisor

	<UNIT>		• Change the unit of the result to mg/mL: Press
				<UNIT>. The display shows:
	KFT volume	3.459 ml
	result unit:	%	•	You wish to have your result in mg/mL. Press
	2 × <SELECT>
				<SELECT> repeatedly until "mg/ml" appears in the
				display.
	<ENTER>		•	Press <ENTER>. The number of decimal places is
				shown after the separator ";". The "3" flashes to show
	KFT volume	3.459 ml
				you that you can now enter a number. Enter here,
	result unit:	mg/ml;3
				e.g. 1 decimal place and exit the inquiry by pressing
	<1>
				<QUIT> twice.
	<ENTER>
	<QUIT>

The result is outputted in the new unit.

787 KF Titrino	15

2.3. Tutorial

It is now necessary to match the factor to the new result unit. A table with a selection of matched quantities for factor, divisor and unit of the sample size can be found in the quick reference.

<CALC DATA> 4 × <ENTER>

KFT volume	3.459 ml
factor	0.1

•Enter a new factor: Press <CALC DATA> and enter the inquiries of the "calculation" group with <ENTER>. Proceed with 3 times <ENTER> to the display:

	<1>	• Enter "1".
<ENTER>
		• As divisor enter the density of the sample.
KFT volume	3.459 ml
divisor	1
<ENTER>
2 × <QUIT>		• Exit the inquiry by pressing <QUIT> twice. The re-
		sult is recalculated and outputted.

2.3.4 Drift

The drift is measured in µL/min. It specifies how much KF reagent is consumed per unit time to keep the titration cell dry. The reagent is needed,

•to titrate moisture in the titration cell.

•to compensate the iodine consumption of slow side reactions.

The drift value is generally of the order of a few µL/min for "dry conditioned" titration cells.

Checking the condition of the solvent

The drift can be displayed during the conditioning of the titration cell with the <DRIFT> key:

<DRIFT>

Drift	4.3 µl/min

• Press <DRIFT>. The first line of the display shows

You can follow the progress of the drift. In fresh solvent the drift value should drop to less than 10 µL/min after a few minutes.

<DRIFT>	• Pressing <DRIFT> once again switches the drift
	display off.

16	787 KF Titrino

2.3 Tutorial

Drift correction of the results

You can correct your results by the drift. This is primarily necessary if you wish to determine very small amounts of moisture or when you have very long titration times.

For the correction "drift value titration time" is subtracted form the dispensed volume:

corrected volume = dispensed volume – (drift value titration time)

The drift value can be determined automatically or entered manually. In the automatic determination the current drift value at the start of the titration is stored and used for the correction. In the manual entry you yourself enter a fixed value, e.g. the stable drift value that you have read off from the display during conditioning.

<CALC DATA>			• Activate the drift correction: Press <CALC DATA>
7 × <ENTER>			and enter the inquiries of the "calculation" group with
			<ENTER>. Proceed with <ENTER> until the dis-
			play shows:
KFT volume	3.459 ml
drift corr.:		OFF

2 × <SELECT> <ENTER>

KFT volume	3.459 ml
drift value	0.0 µl/min

•Make your selection with <SELECT>, e.g. "man.".

•Enter a drift value, e.g. 2.2 µL/min and exit the inquiry.

2.2

<ENTER>

<QUIT>

KFT-Vol -d	2.365 ml

The result is recalculated and the first line of the display shows

-d means that a drift correction has been performed. If you have connected a printer, the full report provides you with all data for recalculation of the result:

date 2002-03-27		time 13:55:10	3
smpl size	0.03	g
KFR volume	3.459	ml
drift man.	2.2	µl/min
(-d)time	1.03
water	922.2	mg/ml

============

787 KF Titrino	17

2.4. Selection of the mode, key <MODE>

2.4 Selection of the mode, key <MODE>

MODE

–

Press key <MODE> until the desired mode is displayed and confirm with <ENTER>.

The following modes can be selected:

•KFT:

Karl Fischer titration

•TITER with H2O or std.:

Titer determination with water or water-containing standard.

•TITER with Na2Tart*2H2O:

titer determination with sodium tartrate.

•BLANK determination: determination of the blank value

The set values under the <CONFIG> and <PARAM> keys apply to all modes, whereas the calculations differ for each mode. Once values have been set they remain effective even if the instrument is switched off.

18	787 KF Titrino

2.5 Configuration, key <CONFIG>

2.5 Configuration, key <CONFIG>

Key <CONFIG> serves to enter device specific data. CONFIG The set values apply to all modes. The quantities

marked with "cond." are also accessible during the conditioning

			KF device settings:
	KFT	********
			Settings for the monitoring of the reagent supply, the
	>KF device settings
			measuring input, the endpoint and the filling rate.
			peripheral units:
			Selection of printer, balance and the curve at the ana-
			log output.
			auxiliaries:
			e.g. setting of dialog language, date, time, etc.
			RS232 settings:
			RS parameters for the COM interface.
			The display texts of the Titrino are shown to the left.
			The values are the default values.
	>KF device settings		KF device settings for all modes
	limit KF reag.	OFF ml	KF reagent volume counter (0...999 mL, OFF)
			is used for monitoring of the
			• reagent supply
			• the buffer capacity of the solvent with 2-component
			reagents
			<CLEAR> sets "OFF".
			If the KF reagent volume counter is activated, the
			inquiry of the current counter status follows.
	actual KF reag.	0 ml	Current counter status (0...999 mL)
	polarizer:	I(pol)	Selection of the polarization mode (I(pol), U(pol))
	I(pol)	50 µA	Polarization current(-127...127 µA)
	EP	250 mV	Endpoint voltage(-1500 mV...1500 mV)
	cond.
	U(pol)	400 mV	Polarization voltage(-1270...1270 mV, in steps of 10 mV)
	EP	25 µA	Endpoint current (-150...150 µA)
	cond.

787 KF Titrino	19

2.5. Configuration, key <CONFIG>

filling rate max. ml/min		Filling rate after the titration (0.01...150 mL/min, max.)
cond.		<CLEAR> sets "max.".
		The maximum rate depends on the Exchange unit:
		Exchange unit	max.
		5 mL	15 mL/min
		10 mL	30 mL/min
		20 mL	60 mL/min
		50 mL	150 mL/min
>RS232 settings		Settings of RS232 interface
		see also page 68.
baud rate:	9600	Baud rate (300, 600, 1200, 2400, 4800, 9600)
data bit:	8	Data bit (7, 8)
stop bit:	1	Stop bit (1, 2)
parity:	none	Parity (even, odd, none)
handshake:	HWs	Handshake (HWs, HWf, SWline, SWchar, none)
		see page 68.
RS control:	ON	Control via RS232 interface (ON, OFF)
		"OFF" means that the receipt of commands via the
		RS232 interface is blocked. Data output is possible.
>peripheral units		Settings for peripheral units
send to:	IBM	Selection of printer (Epson, Seiko, IBM) at the Titrino
		RS232 interface.

"Epson", for Epson Mode, e.g. Epson LX 300+, Citizen iDP 562 RS, Custom DP40-S4N

"Seiko", e.g. for DPU-414

"IBM", e.g. for HP DeskJet types, for all printers with IBM character set Table 437 and IBM graphics, as well as for the data transmission to a computer with Metrodata software VESUV.

balance:	Sartorius	Selection of balance (Sartorius, Mettler, AND, Precisa)
		Sartorius:	Models MP8, MC1
		Mettler:	Models AT, AM, PM, AX, MX, UMX and
			balances with 011, 012, or 016 interface
		AND:	Models ER-60, 120, 180, 182, FR-200, 300
			and FX-200, 300, 320
		Precisa:	Models with RS232C interface
record:	V vs. t	Selection of the curve for the output at the analog
		output (V vs. t, dV/dt vs. t, U vs. t, -U vs. t)
		V vs. t:	Volume vs. time curve
		dV/dt vs. t: Drift vs. time curve
		U vs. t:	Control deviation (current value – EP) vs.
			time curve

20	787 KF Titrino

2.5 Configuration, key <CONFIG>

>auxiliaries

dialog: english

date 2001-03-27

time	08:13
run number	0
electrode test:	ON

display KFR vol.: ON

device label

program 787.0010

General settings

Selection of dialog language (english, deutsch, francais, español)

Current date (YYYY-MM-DD)

Format: Year-month-day, entry with leading zeros.

Current time (HH-MM)

Format: Hours-minutes, entry with leading zeros.

Current run number for result output (0...999)

The sample number is set to 0 when the instrument is switched on and incremented on every determination.

Electrode test (ON, OFF)

Test for polarized electrodes. Performed on changeover from the inactive state to a measurement. "OFF" means that the test is not performed.

Display the dispensed KFR volume in the result display (ON, OFF)

"ON" means the dispensed KFR volume will be displayed in the result output on the first line.

Individual identification of devices (up to 8 ASCII characters)

Display of program version

787 KF Titrino	21